Name: Green Chemistry
Uploaded: 2019-07-19
Duration: 3 min 28 s
Description: Green Chemistry is a new branch of chemistry that works to bring about a reduction in the production of pollutants. On what techniques does it work? Let’s ex...

Question

What is smog? How is classical smog is different from photochemical smog? How can they be controlled?

Accepted Answer

The word smog is a combination of two words smoke and fog. It was named so because for the first time it was observed to be formed by the condensation of some kind of fog on the carbon particles present in the smoke produced by the combustion of fuels like coal and petroleum.

Classical smog is a mixture of fog, smoke and sulphur dioxide gas, it was first observed in London in $1952$ killing about $4000$ people and for this reason, it is also called 'London smog'.

Photochemical smog, which is also known as “Los Angeles smog,” occurs most prominently in urban areas that have large numbers of automobiles, and it requires neither smoke nor fog. It was observed in Los Angeles in $1950$ . It is formed from the action of sunlight on nitrogen dioxide and hydrocarbons released by automobiles and factories.

The smog can be controlled by the following measures :

(i) Emission of nitrogen oxides and hydrocarbons by automobiles into the atmosphere can be prevented by using catalytic converters in automobiles.
(ii) Plantation of certain plants like Pinus, Juniperus, Pyrus and Vitis can metabolise nitrogen oxide and check the formation of photochemical smog.

Odisha Board Solutions for Chapter: Environmental Chemistry, Exercise 1: QUESTIONS

Odisha Board Chemistry Solutions for Exercise - Odisha Board Solutions for Chapter: Environmental Chemistry, Exercise 1: QUESTIONS

Questions from Odisha Board Solutions for Chapter: Environmental Chemistry, Exercise 1: QUESTIONS with Hints & Solutions

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